FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

suntithemai συντίθημι — soon-tith'-em-ahee — middle voice from 4862 and 5087; to place jointly, i.e. (figuratively) to consent (bargain, stipulate), concur:--agree, assent, covenant.

see GREEK for 4862

see GREEK for 5087